Wing for flying machines



Oct. 1, 1929. A. SOLDENHOFF WING FOR FLYING MACHINES Filed Sept. 6. 19273 Sheets-Sheet 1 .[nvevzfom A. GoZcZnAoff Attorney Oct. 1, 1929. A.SOLDENHOFF 1,729,970

WING FOR FLYING MACHINES Filed Sept. '6, 1927 '3 sheets-sheer 2 V g I 01"we" Liam 10 5;"

Oct. 1,1929. SOLDENHQFF 1,729,970

WING FOR FLYING MACHINES Filed Sept. 6, 1927 s sheets-sheet 5 AZ'Cor-r/ey Inven or.-

Patented Oct. 1, 1929 ALEXANDER sonnmvnorr, or zunrcn, swrrznnnnm:

WING FOR FLYING MACHINES Application fled September 6, 1927, Serial No.217,783, and in Germany December 8, 1925.

This invention relates to aeroplanes and other aerial machines and moreparticularly to the supporting planes or wings whereof theunder-surfacesof which have one or more steps.

The invention differs from what is hitherto known in that the steps onthe bottomside of the supporting plane or wing extend in rectilineardirection but obliquely with relation to the longitudinal edges of theplane or wing, or alternately in curves transversely in relation to thedirection of fligh Further essential novel features reside in the factthat, in case of several steps, the same are assembled to meet atdifferent angles, and furthermore in the provision of a rigid bracing orstaying between the rear edge of the step of the plane and the rear edgeof the plane or wing, if required for the purpose of enlarging thesupporting area thereof.

The advantages obtained by this arrangement lies, as compared with thepresent state of the art, in the fact that such supporting surfacespossess immanent stability, that is to say, the relation of the pointsof pressure, in their totality, to the center of gravity of the machinewill be retained in spite of the changing position of flight, and thatthe aircraft will obtain sufiicient propulsion in any gliding orfloating position.

I will now proceed to describe my invention more in detail in connectionwith the embodiments thereof illustrated diagrammatically onv theaccompanying drawings, it being understood that the right is reserved toembodiments other than those actually illustrated herein, to the fullextent indicated by the general meaning of the terms in which the claimsare expressed.

Figures 1 to 9 are top views of various forms of the invention,

Figs. 1 2, 3, 1" and 2 are cross sections through the wings of Figs. 1to 7,- and Fig. 10 is a side view of an aeroplane.

In the drawings showing several constructions of the step arrangementaccording to the present invention, Figures 1 and 2 illustrate anembodiment in which the wing, rigid in itself, has on its under-face acurved face can,

stepping't," formed by the steps 3 and 4 or 5 or constituted by unitingthe steps 3 and fl. A multiple stepping 6, 7 and 8 is shown in Figure 3with the steps 6 and 8 meeting at difierent angles.

Figures 4, 5 and 6 illustrate similar steps 9, 10, 11, 12, 13 and 14particularly for use in connection with supporting surfaces arranged inthe form of an arrow-head.

Figure 7 illustrates an aircraft having wings with a double Figure 8shows two steps 17 and 18 meeting a point in the axial line of'theaircraft and Figure 9 illustrates a modification in which a curved step19 extends from the rear edge of the wing and from the axial line of theaircraft towards the free end of the wing.

Figure 10 shows an aircraft having wings arranged in arrow-headposition, and the profiles a and d thereof.

According to the present invention, the wing either may be limited inthe rear by the rear longitudinal edge of the step or a rigid bracing orstaying means may be provided between the said longitudinal edge and therear edge of the plane or wing for the purpose of increasing the area ofthe supportmg surface, as hereinbefore intimated.

According to-the present invention, the low er carrying surface of thewings can be bounded by the rear edge of the step or in case of aplurality of steps by the rear edge of the rearmost step, whereby thusbetween the rearmost edge of the wings and the edge of the rearmost stepwill form an open chamber, that is, an open surface will remain.This'open surhowever, be also covered and as a matter of fact by meansof a rigid cover, which is secured on one side to the rear edge of therear step and at the other side to the rear edge of the wings, wherebythe rigidity is increased as also the carrying surface of the wingswhich likewise is increased.

I have herein described and shown several practical constructions of mypresent improvements, but it will be apparent that the latter aresusceptible of embodiment in various other alternative forms and I,therefore, reserve the privilege of resorting to all such legitimatechanges as may be fairly embodied within the spirit and scope of theinvention as claimed.

I claim as my invention 1. A supporting plane or wing for aircraftcomprising a step on the underside of the wing extending in rectilineardirection and obliquely in relation to the longitudinal edges of thesupporting surface or in curves transversely with relation to thedirection of flight.

2. A supporting plane or wing for aircraft comprising a plurality ofsteps on the underside of the wing extending in rectilinear directionand obliquely in relation to the longitudinal edges of the supportingsurface or in curves transversely with relation to the direction offlight.

3. A supporting plane or wing for aircraft comprising a plurality ofsteps on the underside of the Wing extending in rectilinear directionand obliquely in relation to the longitudinal edges of the supportingsurface or in curves transversely with relation to the direction offlight, said steps meeting each other at difierent angles.

4. A supporting plane or wing for aircraft comprising a step on theunderside of the wing extending in rectilinear direction and obliquelyin relation to the longitudinal edges of the supporting surface or incurves transversely with relation to the direction of'flight', the spacebetween the rear edge of the step and the rear edge of the wing beingcovered with a rigid cover to strengthen the wing and to increase thesurface thereof.

5. A supporting plane or wing for aircraft comprising a plurality ofsteps on the underside of the wing extending in rectilinear directionand obliquely in relation to the longitudinal edges of the supportingsurface or in curves transversely with relation to the direction offlight, the space between the rear edge of the rearmost step and therear edge of the wing being covered with a rigid cover to stren then thewing and to increase the surface t ereof.

In testimony whereof I affix my signature.

ALEXANDER SOLDENHOFF.

